1988. Toma, seventeen, lives in a town by a river with his father, who is engaged in some shady dealings, and his father’s mistress, Kotoko. He sometimes visits his mother, Jinko, who runs a fish shop. Toma is disgusted by his father’s activities and his daily abusive sex sessions with Kotoko but he becomes very aware of the similarities he reluctantly shares with his father when he starts dating Chigusa. One day, Toma suddenly turns violent and Chigusa leaves him. In the meantime, a typhoon approaches and floods the town, allowing Kotoko, now pregnant, to run away from Toma’s father. Enraged, the latter goes on a frantic search for his mistress only interrupted by his encounter with Chigusa, who is waiting for Toma in a shrine to make up with him.